Two Frames and a Five-Link Rear Suspension for the 2021 Ford F-150 Raptor

Two Frames and a Five-Link Rear Suspension for the 2021 Ford F-150 Raptor


Ford F-150 Full Overview

Ford’s desert-race darling Raptor has supplied two frames earlier than, however that was to accommodate totally different cabs. Now supplied in SuperCrew configuration solely, the 2021 Ford F-150 Raptor will get a separate body simply to deal with the beating it’ll take from the brand new Raptor 37 variant’s Large Foot 37-inch tires when bounding off rocks and throughout arroyos. Let’s study the frames, the Dwell Valve Fox Shox, the “trombone exhaust,” and different technical highlights that promise to make this third-generation Raptor the baddest of all of them.

Two New Frames

All 2021 Raptor frames differ vastly from these of their lesser F-150 brethren to accommodate the longer-travel unbiased entrance and all-new five-link, coil-spring, live-axle rear suspension setups. In entrance are taller, stronger shock towers and a singular rear decrease management arm pivot. On the rear, there are the control-arm mounting brackets, higher spring perches, and strengthened shock mounting areas

The Raptor 37 body is additional modified with reinforcements to areas just like the rear jounce-bumper mounts to raised face up to the forces generated by the large and massively heavy 37-inch tires. And it is modified to accommodate a 37-inch spare tire. This entails altering a crossmember and the winch plate that lowers the spare. A distinct trailer hitch, bumper, and tow hooks had been additionally required, however this construction is shared with the bottom Raptor.

Rear Suspension Particulars

Changing the rear leaf springs Ford has outfitted the F-Collection with perpetually are a pair of trailing arms on both sides, a set of 24-inch variable-rate coil springs, and a Panhard rod in again for lateral positioning. Earlier than they’re put in, these springs measure 0.Four inch taller than these on the Ram 1500 TRX, rating them because the trade’s longest. They function variable taper and variable pitch to attain three spring charges all through the suspension’s full vary of journey. This setup saves 11 kilos of mass general and reduces unsprung mass by a powerful 40 kilos.

Entrance Suspension Revisions

Rising suspension journey means including rebound journey. Up entrance, this required elevating the higher control-arm mounts 0.Four inch and counting on new knuckles and management arms that find the higher ball joint 0.7 inch larger and the decrease ball joint barely decrease. The ball joints are additionally new, as are the entrance half-shaft internal CV joints, to permit for the extra excessive angles skilled at full suspension droop.

Two New Units of Fox Shocks, Revised Dwell Valve Tech

This subsequent era of Fox shock offers double the compression management, which leads to significantly larger inner forces. The tubes are fabricated from thicker metallic to deal with the added stress. Inside, they function 9 zones of damping tune with inner bypass valving that varies with the place of the piston. The entrance shocks function 1.0-inch-diameter piston shafts (up from 7/8-inch) and all make the most of a brand new lower-friction shock fluid that higher resists warmth buildup. The vary of authority of the electronically adjustable dampers is roughly doubled to supply upward of 1,000 kilos of damping per nook at desert speeds. Entrance and rear shocks all do their very own sensing now (the rears used to take enter from the fronts), and the damping price could be modified in 80 milliseconds—the time it takes a human mind to course of visible data. The Raptor 37 will get distinctive shocks tuned for the elevated unsprung weight and revised journey.

Suspension Journey by the Numbers

Discuss concerning the relentless march of progress—the world’s first completely superior manufacturing facility desert racer, the 2010 Raptor, made do with a piddling 11.2 inches of entrance journey and 12.Zero inches within the rear. The second-gen fashions bumped that as much as 13.Zero inches in entrance, 13.9 inches in rear journey, and for 2021, the bottom Raptor’s entrance wheels arc via 14.Zero inches of journey, whereas the rears can swing 15.Zero inches. Interference points with the bigger 37-inch tires prohibit their complete journey to 13.Zero inches in entrance, 14.1 within the rear on the Raptor 37. For these preserving rating at house, the corresponding figures for the Raptor’s lone new competitor, the 2021 MotorTrend Truck of the Year Ram 1500 TRX, are 13.Zero and 14.Zero inches, respectively.

Off-Highway Clearance by the Numbers

Total floor clearance, method, breakover, and departure angles enhance from the second-gen mannequin’s 11.5 inches and 30.2/21.8/23.Zero levels to 12.Zero inches and 31.0/22.7/23.9 levels with the bottom 35-inch tire, and to 13.1 inches and 33.1/24.4/24.9 levels on 37s. Once more, to avoid wasting you Googling, TRX stats are 11.Eight inches and 30.2/21.9/23.5 levels.

Engine Tech and Trombone Exhaust

Scrutinizing the specs reveals that, for 2021, the three.5-liter twin-turbo EcoBoost V-6 will get a compression-ratio bump from 10.0:1 to 10.5:1, a slight drop in coolant capability (14.Four to 13.Zero quarts), and a rise in alternator output from 220 to 240 amps. None of that is more likely to alter the height output figures a lot (emissions rules drove a lot of that), however Ford is claiming improved low-end torque.

Raptor’s trick new 3.0-inch-diameter exhaust system could but repay in a couple of added ponies (ultimate calibration is not anticipated for a couple of extra weeks). The exhaust runs down the passenger facet of the truck. This might trigger exhaust from the driver-side financial institution to movement via an extended pipe, if not for a brand new “trombone loop” simply aft of the engine compartment that equalizes these path lengths. The result’s vastly improved sound. A brand new muffler with revised baffling and a bypass system additionally does wonders on this regard. Open the 2 valves within the pipes exiting the muffler totally for Baja drive mode, and the exhaust principally short-circuits straight via the muffler, dumping into an X-shaped crossover pipe earlier than exiting the twin tailpipes. Partaking quiet mode closes these valves, forcing the exhaust via all the muffler’s baffling and out a single pipe that rejoins that X-pipe. Two intermediate sound settings, regular and sport, cut up the distinction between totally open and totally closed tailpipe valves.

Coil Suspension Yields Crisper Shifts, Faster Sprints?

Name Ripley’s; it is true. Leaf springs enable a dwell axle to “wind up,” or twist barely, because the tires ship torque to the street. To attenuate this impact, shifts have been slurred barely prior to now, however the higher and decrease trailing arms on both sides of the axle remove this phenomenon, so sport mode shifts could be sharper and crisper. Traction can also be improved with this rear suspension, so even when the facility, torque, and curb weight match the second-gen truck’s, we will in all probability anticipate barely faster 0-60 mph occasions—not sufficient so to securely race TRXs for pink slips, thoughts you. That job will fall to the 2022 Ford F-150 Raptor R.

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